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  • The ST25RU3993 RAIN® (UHF) RFID reader device provides multi-protocol support for the 840-960 MHz UHF band compatible with ISO18000-62 & -63, ISO29143 and to GS1’s EPC UHF Gen2 air interface protocol. It includes an on-chip VCO and a power amplifier, and offers a complete set of RFID features including dense reader mode (DRM) functionality and support for frequency-hopping, low-level transmission coding, low-level decode, data framing and CRC checking.

    The ST25RU3993 operates at very low-power, making it suitable for use in portable and battery-powered equipment such as mobile phones.
    Packaged in a 7x7 mm QFN, the ST25RU3993 is able to deliver very high sensitivity and provides high immunity against the effects of antenna reflection and self-jamming. This is critical in mobile and embedded applications, in which antenna design is often compromised by cost or size constraints. High sensitivity enables the end-products to achieve their required read range while using a simpler and cheaper antenna, thus reducing overall system cost.
    Thanks to its high level of integration, the ST25RU3993 requires only an external 8-bit microcontroller to create a complete RFID reader system, thus eliminating the need for a complex RFID co-processor.

    Key Features

    • Supply voltage range 3.0 to 3.6 V
      • Limited operation possible down to 2.7 V
      • Maximum PA supply voltage 4.3 V
      • Peripheral I/O supply range 1.65 to 5.5 V
    • Protocol support for:
      • ISO 18000-6C (EPC Class1 Gen2)
      • ISO 29143 (Air interface for mobile RFID)
      • ISO 18000-6A/B through direct mode
    • DRM: 250 kHz and 320 kHz filters for M4 and M8
    • Integrated supply regulators
    • Frequency hopping support
    • ASK or PR-ASK modulation
    • Automatic I/Q selection
    • Phase bit for tag tracking with 8-bit linear RSSI
    • Temperature range: -40 °C to 85 °C
    • 48-pin QFN (7x7x0.9 mm) package
    • Tag read rates of up to 700* tags/s (16-bit tag EPC length)

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Development Tools

    • Part Number

      Software Development Kit for ST25RU3993 based EVAL boards

Embedded Software

    • Part Number

      PC software installer for ST25RU3993-EVAL

Evaluation Tools

    • Part Number

      ST25RU3993 reader IC evaluation board

00 Files selected for download

Technical Documentation

    • Description Version Size Action
      DS11840
      RAIN® RFID single chip reader EPC Class1 Gen2 compatible
      9.0
      1.34 MB
      PDF
      DS11840

      RAIN® RFID single chip reader EPC Class1 Gen2 compatible

    • Description Version Size Action
      AN4971
      Received signal strength indicator (RSSI) for ST25RU3993
      1.0
      308.63 KB
      PDF
      AN4970
      Reflected RF level indicator for ST25RU3993
      1.0
      276.48 KB
      PDF
      AN4971

      Received signal strength indicator (RSSI) for ST25RU3993

      AN4970

      Reflected RF level indicator for ST25RU3993

    • Description Version Size Action
      AN5308
      Near field loop antenna for the ST25RU3993-EVAL board
      1.0
      715.31 KB
      PDF
      AN5414
      SAW filter usage for the ST25RU3993-EVAL board
      1.0
      1.43 MB
      PDF
      AN5308

      Near field loop antenna for the ST25RU3993-EVAL board

      AN5414

      SAW filter usage for the ST25RU3993-EVAL board

Publications and Collaterals

    • Description Version Size Action
      UHF Rain® RFID Readers - ST25RU series 1.0
      174.96 KB
      PDF

      UHF Rain® RFID Readers - ST25RU series

Quality and Reliability

Part Number Marketing Status Package Grade RoHS Compliance Grade Material Declaration**
ST25RU3993-BQFT
Active
VFQFPN 48 7x7x1.0 Industrial N/A

ST25RU3993-BQFT

Package:

VFQFPN 48 7x7x1.0

Material Declaration**:

PDF XML

Marketing Status

Active

Package

VFQFPN 48 7x7x1.0

Grade

Industrial

RoHS Compliance Grade

N/A

(**) The Material Declaration forms available on st.com may be generic documents based on the most commonly used package within a package family. For this reason, they may not be 100% accurate for a specific device. Please contact our sales support for information on specific devices.

Sample & Buy

Part Number
Order from Distributors
Order from ST
Package
Packing Type
Marketing Status
ECCN (US)
Country of Origin
Budgetary Price (US$)*/Qty
ST25RU3993-BQFT Available at 3 distributors

Distributor availability ofST25RU3993-BQFT

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 1662 1 Order Now
Newark Element14 AMERICA 44 0 Order Now
MOUSER WORLDWIDE 161 1 Order Now

Distributor reported inventory date: 2020-07-06

Distributor Name

DIGIKEY

Stock

1662

Min.Order

1

Region

WORLDWIDE Order Now

Newark Element14

Stock

44

Min.Order

0

Region

AMERICA Order Now

MOUSER

Stock

161

Min.Order

1

Region

WORLDWIDE Order Now

Distributor reported inventory date: 2020-07-06

Buy now VFQFPN 48 7x7x1.0 Tape And Reel
Active
EAR99 PHILIPPINES 29.0 / 1k

ST25RU3993-BQFT

Package

VFQFPN 48 7x7x1.0

Packing Type

Tape And Reel

Budgetary Price (US$)*/Qty

29.0 / 1k

Distributor availability ofST25RU3993-BQFT

Distributor Name
Region Stock Min. Order Third party link
DIGIKEY WORLDWIDE 1662 1 Order Now
Newark Element14 AMERICA 44 0 Order Now
MOUSER WORLDWIDE 161 1 Order Now

Distributor reported inventory date: 2020-07-06

Distributor Name

DIGIKEY

Stock

1662

Min.Order

1

Region

WORLDWIDE Order Now

Newark Element14

Stock

44

Min.Order

0

Region

AMERICA Order Now

MOUSER

Stock

161

Min.Order

1

Region

WORLDWIDE Order Now

Distributor reported inventory date: 2020-07-06

Marketing Status

Active

Budgetary Price (US$)* / Qty

29.0 / 1k

ECCN (US)

EAR99

Country of Origin

PHILIPPINES

(*) Suggested Resale Price per unit (USD) for BUDGETARY USE ONLY. For quotes, prices in local currency, please contact your local ST Sales Office  or our Distributors